Forbid user to change file flags on quota files

[net-next-2.6.git] / fs / ext3 / ioctl.c

diff --git a/fs/ext3/ioctl.c b/fs/ext3/ioctl.c
index 4a2a02c95bf94b98fc4534d870f3546a45442c8e..023a070f55f18fac29cfddafa08557085ad6b2fa 100644 (file)
--- a/fs/ext3/ioctl.c
+++ b/fs/ext3/ioctl.c
@@ -51,6 +51,11 @@ int ext3_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
                        flags &= ~EXT3_DIRSYNC_FL;
 
                mutex_lock(&inode->i_mutex);
+               /* Is it quota file? Do not allow user to mess with it */
+               if (IS_NOQUOTA(inode)) {
+                       mutex_unlock(&inode->i_mutex);
+                       return -EPERM;
+               }
                oldflags = ei->i_flags;
 
                /* The JOURNAL_DATA flag is modifiable only by root */